CN107635120A - A kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges - Google Patents
A kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges Download PDFInfo
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- CN107635120A CN107635120A CN201710846162.0A CN201710846162A CN107635120A CN 107635120 A CN107635120 A CN 107635120A CN 201710846162 A CN201710846162 A CN 201710846162A CN 107635120 A CN107635120 A CN 107635120A
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Abstract
The invention discloses a kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges, belongs to descriptive geometry correction, image fusion technology field.This method uses Render To Texture technologies first, the advance render scenes data of RTT cameras, obtains scene texture Buffer spatial caches；Next establishes postorder rendering camera, add the plane geometry body Model of screen window size, the plane geometry body employs 3 bezier surfaces and created, number of control points is controllable, maximum is no more than 8 × 8 control points, point value is controlled by changing, promotes the change of vertex data value, so as to realize the function of geometric correction；Finally, region is merged in multi-channel projection, fusion figure is generated by blending algorithm, the fusion schemes to be used for the brightness of real image multiple channel ball band curtain, contrast in the fusion non-linear change in region, it is achieved thereby that the brightness of each interchannel, contrast uniformity, are finally completed multiple channel ball band curtain Geometry rectification and fusion function.
Description
Technical field
The present invention relates to a kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges, belongs to descriptive geometry correction, figure
As integration technology field.
Background technology
With greatly promoting for the horizontal raising of computer hardware, particularly the GPU computation capabilities of video card, the place of image
Reason ability is constantly strengthened, and projection display system is huge in the effect of flight simulator analogue system.Due to current flight simulation
More using post curtain, real image spherical zone curtain, virtual image curtain etc., the light that more projector projects go out will necessarily be deposited device in screen display
In a certain degree of geometry deformation, under conditions of no curved surface adjustment, the image of projection can not be watched at all.
Because using Duo Tai projectors, intensity of illumination, colorfulness in the public domain of projection are the weight of 2 or more platforms
Overlay is closed, so as to have bright band and blackening, and the picture material overlapped on interchannel picture.In order to solve in each projection
It is abnormal to produce the picture of separation, real image picture unification, it is necessary to eliminate picture color, the difference of brightness.
The content of the invention
The technical problems to be solved by the invention are the defects of overcoming prior art, there is provided a kind of multiple channel ball curtain geometry is rectified
Just and Fusion Edges method, the brightness of whole screen, colorfulness, with spend it is consistent.
To reach above-mentioned purpose, the present invention provides a kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges, including
Following steps：
Foundation and the true ball curtain radius size identical virtual ball curtain in real space in Virtual Space, in Virtual Space
Longitude and latitude grid ball is established using mesh model, longitude and latitude grid ball includes a plurality of warp and a plurality of parallel, the segmentation of latitude and longitude grid ball
Virtual ball curtain；
S2 cameras obtain the texture cache picture A of scene；
Texture cache the picture B, picture A that S3 cameras obtain scene are identical with picture B；
M projecting apparatus according to the position fixed placement of light path design around true ball curtain, launch picture B and arrive by projecting apparatus
In projection spherical curtain；
Longitude, the latitude of theodolite equipment solving virtual ball curtain arbitrfary point position；
Picture A is attached on bezier surface in virtual ball curtain, bezier surface has N × N (5≤N≤8) control point,
Adjusting control point value using theodolite instrument makes the mesh point numerical value mapping on picture A reset into corresponding point on true ball curtain
Position；
Previous step is repeated to remaining projecting apparatus until all Projector calibrations finish；
The viewing area that M projected channel is launched, new integration region, the figure that each projecting apparatus is launched are formed on ball curtain
As there is intersection the image border that edge is launched with adjacent projecting apparatus；According to new integration region, integration region is drawn
Profile diagram, fusion figure C is obtained finally by calculating fusion；
Single channel projection picture A and fusion figure C use Level Shading Language programming realization AC mixing pictures, each projection
Passage counterpoise duplicate step, is finally completed the correction of ball curtain with merging.
Preferentially, the texture cache picture A for obtaining print comprises the following steps：
Including principal phase machine, RTT cameras and camera is faced, it is S1 to define principal phase machine, and it is S2 to define RTT cameras, and definition is faced
Camera is S3；S2 projection matrixes=S1 projection matrixes × S2 project migration matrix, S2 viewing matrixs=S1 viewing matrixs × S2
View offset matrix, each frame obtain S2 texture cache pictures A；S3 projection matrixes are defined as facing matrix, and S3 viewing matrixs are determined
Justice is unit matrix, and each frame obtains S3 texture cache pictures B.3. a kind of multiple channel ball curtain according to claim 1 is several
What correction and the method for Fusion Edges, it is characterised in that control point value is adjusted using theodolite instrument, makes the net on picture A
The mapping of lattice point numerical value resets into corresponding point position on true ball curtain and comprised the following steps：
Position coordinates of the ball curtain point corresponding to centre of sphere longitude and latitude is measured with total powerstation instrument, total powerstation resolves mapping journey
Sequence, input parameter are total powerstation Q coordinate points (X0,Y0,Z0), R is ball curtain radius, and θ, β are ball curtain longitude, latitude parameter, xc、yc、
zcFor centre of sphere center position.Arbitrfary point P space coordinates on resolving ball curtain, P point coordinates (X, Y, Z), its formula are as follows：
X=R*sin (θ) * sin (β)+xc
Y=R*sin (θ) * cos (β)+yc (1)
Z=R*cos (β)+zc
Total powerstation Q latitude coordinates corresponding to P points are solved, its formula is as follows：
Qlat=R*sin (θ) * cos (β)+yc
Can be in the hope of P points position according to formula (1) (2), the corresponding coordinate point of corresponding total powerstation Q points position, by by spherical zone
Curtain 5 ° of one lattice of longitude, 5 ° of one lattice division of latitude, solve PnTwo-dimensional array, batch solve Qn.Finally reversely tabling look-up using total powerstation
Method, measure PnPosition.
Preferentially, projector projects grid picture B is projected on ball curtain, is manually adjusted N × N control point values, is changed figure
As B shows final pixel position on ball curtain.
Preferentially, the grid picture B of projector projects is projected on ball curtain, to the plane geometry body shellfish on grid picture B
Sai Er surface model N × N control points carry out graph transformation, comprise the following steps：
Bicubic Bezier patch is established, Bezier curved surfaces are assumed to be defined as P using (m+1) × (n+1) control pointsi,j, ginseng
Examination point is control point, and its formula is as follows：
u,v∈[0,1]
Wherein：It is Bernstein letters
Number.
Preferentially, according to new integration region, integration region profile diagram is drawn, fusion band is obtained finally by blending algorithm
Fusion figure comprises the following steps：Fusion band image is obtained, is that every projecting apparatus creates alpha-mask pictures, alpha-
Weight is Am(u, v) is each pixel PmMask map values, are calculated by equation below：
Wherein：am(m, u, v)=wi(m,u,v)*di(m, u, v), di(m, u, v) is pixel Pi in fusion band overlay region
(u, v) nearest Edge Distance d.wi(m, u, v)=1, represent the pixel for point in projection integration region, wiThe table of (m, u, v)=0
Show the pixel for projection integration region exterior point.
Preferentially, projected image B location of pixels adjusted end, fusion figure C calculate after after mix A, C picture
Close, final passage is shown as the new fusion figures of image B, wherein ArgbaTo scheme A pixels, RGBA channel values, BrgbaTo scheme B pixels
Point, RGBA channel values, CrgbaTo scheme C pixels, RGBA channel values.Its formula is as follows：
Brgba=Argba*Crgba (5)。
Beneficial effects of the present invention：
The present invention direct Solving Multichannel spherical zone curtain projection system light path correction in TerrSim vision simulation softwares, it is whole
The brightness of individual screen, colorfulness, the consistent technical method with spending；The rapid distortion correction of image, retardance base can be realized
Originally can ignore；Stability is high, and the function can be used as one standalone module of our company's vision simulation software, without extra increase
Hardware cost, integrated level greatly improve；In flight simulator analogue system, military VR analogue systems, multichannel teaching, amusement
All have wide practical use etc. system.
Brief description of the drawings
Fig. 1 is the application framework figure of the present invention.
Fig. 2 is the flow chart of the present invention；
Fig. 3 is projecting light path's figure of virtual ball curtain in the present invention；
Fig. 4 is the total powerstation position tool figure in the present invention；
Fig. 5 is the schematic diagram before the correction of virtual ball curtain in the present invention；
Fig. 6 is the schematic diagram after the correction of virtual ball curtain in the present invention；
Fig. 7 is that virtual ball curtain merges schematic diagram in the present invention；
Fig. 8 is design sketch after the correction of true ball curtain in the present invention；
Fig. 9 is Fig. 6 schematic diagram.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in Fig. 2 a kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges, comprises the following steps：
As shown in figure 3, the true ball curtain radius size identical virtual ball curtain in Virtual Space foundation and real space,
Longitude and latitude grid ball is established using mesh model in Virtual Space, longitude and latitude grid ball includes a plurality of warp and a plurality of parallel, latitude and longitude
Grid ball splits virtual ball curtain；
S2 cameras obtain the texture cache picture A of scene；
Texture cache the picture B, picture A that S3 cameras obtain scene are identical with picture B；
M projecting apparatus according to the position fixed placement of light path design around true ball curtain, launch picture B and arrive by projecting apparatus
In projection spherical curtain；
Longitude, the latitude of theodolite equipment solving virtual ball curtain arbitrfary point position；
Picture A is attached on bezier surface in virtual ball curtain, bezier surface has N × N (5≤N≤8) control point,
Adjusting control point value using theodolite instrument makes the mesh point numerical value mapping on picture A reset into corresponding point on true ball curtain
Position；
Previous step is repeated to remaining projecting apparatus until all Projector calibrations finish；
The viewing area that M projected channel is launched, new integration region, the figure that each projecting apparatus is launched are formed on ball curtain
As there is intersection the image border that edge is launched with adjacent projecting apparatus；According to new integration region, integration region is drawn
Profile diagram, fusion figure C is obtained finally by calculating fusion；
Single channel projection picture A and fusion figure C use Level Shading Language programming realization AC mixing pictures, each projection
Passage counterpoise duplicate step, is finally completed the correction of ball curtain with merging.
Further, the texture cache picture A for obtaining print comprises the following steps：
Including principal phase machine, RTT cameras and camera is faced, it is S1 to define principal phase machine, and it is S2 to define RTT cameras, and definition is faced
Camera is S3；S2 projection matrixes=S1 projection matrixes × S2 project migration matrix, S2 viewing matrixs=S1 viewing matrixs × S2
View offset matrix, each frame obtain S2 texture cache pictures A；S3 projection matrixes are defined as facing matrix, and S3 viewing matrixs are determined
Justice is unit matrix, and each frame obtains S3 texture cache pictures B.3. a kind of multiple channel ball curtain according to claim 1 is several
What correction and the method for Fusion Edges, it is characterised in that control point value is adjusted using theodolite instrument, makes the net on picture A
The mapping of lattice point numerical value resets into corresponding point position on true ball curtain and comprised the following steps：
As shown in figure 4, measure position coordinates of the ball curtain point corresponding to centre of sphere longitude and latitude, total powerstation with total powerstation instrument
Mapping program is resolved, input parameter is total powerstation Q coordinate points (X0,Y0,Z0), R is ball curtain radius, and θ, β are ball curtain longitude, latitude
Parameter, xc、yc、zcFor centre of sphere center position.Resolve arbitrfary point P space coordinates on ball curtain, P point coordinates (X, Y, Z), its formula
It is as follows：
X=R*sin (θ) * sin (β)+xc
Y=R*sin (θ) * cos (β)+yc (1)
Z=R*cos (β)+zc
Total powerstation Q latitude coordinates corresponding to P points are solved, its formula is as follows：
Qlat=R*sin (θ) * cos (β)+yc
Can be in the hope of P points position according to formula (1) (2), the corresponding coordinate point of corresponding total powerstation Q points position, by by spherical zone
Curtain 5 ° of one lattice of longitude, 5 ° of one lattice division of latitude, solve PnTwo-dimensional array, batch solve Qn.Finally reversely tabling look-up using total powerstation
Method, measure PnPosition.
Further, projector projects grid picture B is projected on ball curtain, is manually adjusted N × N control point values, is changed
Image B shows final pixel position on ball curtain.
Further, the grid picture B of projector projects is projected on ball curtain, to the plane geometry body on grid picture B
Bezier surface model N × N control points carry out graph transformation, comprise the following steps：
Bicubic Bezier patch is established, Bezier curved surfaces are assumed to be defined as P using (m+1) × (n+1) control pointsi,j, ginseng
Examination point is control point, and its formula is as follows：
u,v∈[0,1]
Wherein：It is Bernstein letters
Number.
Further, according to new integration region, integration region profile diagram is drawn, obtains and merges finally by blending algorithm
Band fusion figure comprises the following steps：Fusion band image is obtained, is that every projecting apparatus creates alpha-mask pictures, alpha-
Weight is Am(u, v) is each pixel PmMask map values, are calculated by equation below：
Wherein：am(m, u, v)=wi(m,u,v)*di(m, u, v), di(m, u, v) is pixel Pi in fusion band overlay region
(u, v) nearest Edge Distance d.wi(m, u, v)=1, represent the pixel for point in projection integration region, wiThe table of (m, u, v)=0
Show the pixel for projection integration region exterior point.
Further, projected image B location of pixels adjusted end, fusion figure C calculate after after mix A, C picture
Close, final passage is shown as the new fusion figures of image B, wherein ArgbaTo scheme A pixels, RGBA channel values, BrgbaTo scheme B pixels
Point, RGBA channel values, CrgbaTo scheme C pixels, RGBA channel values.Its formula is as follows：
Brgba=Argba*Crgba (5)。
Single channel projection picture B and fusion figure C use Level Shading Language programming realization BC mixing pictures, each passage
Similar algorithm is used, is finally completed the correction of ball curtain with merging.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of method of multiple channel ball curtain Geometry rectification and Fusion Edges, it is characterised in that comprise the following steps：
In Virtual Space, foundation and the true ball curtain radius size identical virtual ball curtain in real space, are used in Virtual Space
Mesh model establishes longitude and latitude grid ball, and longitude and latitude grid ball includes a plurality of warp and a plurality of parallel, and the segmentation of latitude and longitude grid ball is virtual
Ball curtain；
S2 cameras obtain the texture cache picture A of scene；
Texture cache the picture B, picture A that S3 cameras obtain scene are identical with picture B；
For M projecting apparatus according to the position fixed placement of light path design around true ball curtain, single projector launches figure respectively
Piece B is on true ball curtain；
Longitude, the latitude of theodolite equipment solving virtual ball curtain arbitrfary point position；
Picture A is attached on bezier surface in virtual ball curtain, bezier surface has N × N (5≤N≤8) control point, uses
Theodolite instrument adjustment control point value makes the mesh point numerical value mapping on picture A reset into corresponding point position on true ball curtain；
Previous step is repeated to remaining projecting apparatus until all Projector calibrations finish；
The viewing area that M projected channel is launched, new integration region, the image side that each projecting apparatus is launched are formed on ball curtain
There is intersection the image border that edge is launched with adjacent projecting apparatus；According to new integration region, integration region profile is drawn
Figure, fusion figure C is obtained finally by calculating fusion；
Single channel projection picture A and fusion figure C use Level Shading Language programming realization AC mixing pictures, each projected channel
Counterpoise duplicate step, the correction of ball curtain is finally completed with merging.
2. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 1 and Fusion Edges, it is characterised in that obtain
The texture cache picture A of coupongs comprises the following steps：
Including principal phase machine, RTT cameras and camera is faced, it is S1 to define principal phase machine, and it is S2 to define RTT cameras, and camera is faced in definition
For S3；S2 projection matrixes=S1 projection matrixes × S2 project migration matrix, S2 viewing matrixs=S1 viewing matrixs × S2 views
Excursion matrix, each frame obtain S2 texture cache pictures A；S3 projection matrixes are defined as facing matrix, and S3 viewing matrixs are defined as
Unit matrix, each frame obtain S3 texture cache pictures B.
3. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 1 and Fusion Edges, it is characterised in that adopt
Control point value is adjusted with theodolite instrument, the mesh point numerical value on picture A is mapped and resets into corresponding point on true ball curtain
Position comprises the following steps：
Position coordinates of the ball curtain point corresponding to centre of sphere longitude and latitude is measured with total powerstation instrument, total powerstation resolves mapping program,
Input parameter is total powerstation Q coordinate points (X0,Y0,Z0), R is ball curtain radius, and θ, β are ball curtain longitude, latitude parameter, xc、yc、zcFor
Centre of sphere center position.Arbitrfary point P space coordinates on resolving ball curtain, P point coordinates (X, Y, Z), its formula are as follows：
Total powerstation Q latitude coordinates corresponding to P points are solved, its formula is as follows：
Can be in the hope of P points position according to formula (1) (2), the corresponding coordinate point of corresponding total powerstation Q points position, by the way that spherical zone curtain is passed through
5 ° of one lattice is spent, 5 ° of one lattice division of latitude, solves PnTwo-dimensional array, batch solve Qn.Finally utilize the side reversely tabled look-up of total powerstation
Method, measure PnPosition.
4. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 1 and Fusion Edges, it is characterised in that throw
Shadow instrument projection grid picture B is projected on ball curtain, is manually adjusted N × N control point values, is changed image B and shown most on ball curtain
Whole location of pixels.
5. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 4 and Fusion Edges, it is characterised in that throw
The grid picture B of shadow instrument projection is projected on ball curtain, and plane geometry body bezier surface model N × N on grid picture B is controlled
System point carries out graph transformation, comprises the following steps：
Bicubic Bezier patch is established, Bezier curved surfaces are assumed to be defined as P using (m+1) × (n+1) control pointsi,j, reference point
That is control point, its formula are as follows：
Wherein：It is Bernstein functions.
6. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 1 and Fusion Edges, it is characterised in that according to
According to new integration region, integration region profile diagram is drawn, obtaining fusion band fusion figure finally by blending algorithm includes following step
Suddenly：Fusion band image is obtained, is that every projecting apparatus creates alpha-mask pictures, alpha-weight Am(u, v) is every
Individual pixel PmMask map values, are calculated by equation below：
Wherein：am(m, u, v)=wi(m,u,v)*di(m, u, v), di(m, u, v) is pixel Pi at fusion band overlay region (u, v)
Nearest Edge Distance d.wi(m, u, v)=1, represent the pixel for point in projection integration region, wi(m, u, v)=0 represents the picture
Vegetarian refreshments is projection integration region exterior point.
7. the method for a kind of multiple channel ball curtain Geometry rectification according to claim 1 and Fusion Edges, it is characterised in that throw
The adjusted end of shadow image B location of pixels, fusion figure C calculate after after mix A, C picture, final passage is shown as figure
As the new fusion figures of B, wherein ArgbaTo scheme A pixels, RGBA channel values, BrgbaTo scheme B pixels, RGBA channel values, CrgbaFor
Scheme C pixels, RGBA channel values.Its formula is as follows：
Brgba=Argba*Crgba (5)。
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| CN111192552B (en) * | 2019-12-13 | 2021-03-23 | 南京乐飞航空技术有限公司 | Multi-channel LED spherical screen geometric correction method |
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| CN114449235B (en) * | 2020-10-30 | 2024-01-12 | 中强光电股份有限公司 | Method and device for homogenizing pictures of multiple projectors |
| CN114449235A (en) * | 2020-10-30 | 2022-05-06 | 中强光电股份有限公司 | Method and device for homogenizing pictures of multiple projectors |
| CN112330556A (en) * | 2020-11-03 | 2021-02-05 | 燕山大学 | Spherical screen projection geometric correction method based on rational Bessel curved surface |
| CN112330556B (en) * | 2020-11-03 | 2022-04-19 | 燕山大学 | Spherical screen projection geometric correction method based on rational Bessel curved surface |
| CN114666556A (en) * | 2022-02-23 | 2022-06-24 | 深圳华侨城文化旅游科技集团有限公司 | Method, system, equipment and storage medium for fusing back projection spherical screen edges |
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